/* 页脚与头图透明 */
#footer {
  background: transparent !important;
}
#page-header {
  background: transparent !important;
}

/* 白天模式遮罩透明 */
#footer::before {
  background: transparent !important;
}
#page-header::before {
  background: transparent !important;
}

/* 夜间模式遮罩透明 */
[data-theme="dark"] #footer::before {
  background: transparent !important;
}
[data-theme="dark"] #page-header::before {
  background: transparent !important;
}

/*哔哩哔哩视频适配*/
.aspect-ratio {
  position: relative;
  width: 90%;
  height: auto;
  padding-bottom: 59%;
  margin: 3% auto;
  text-align: center;
}
.aspect-ratio iframe {
  position: absolute;
  width: 100%;
  height: 86%;
  left: 0;
  top: 0;
}